KR-20260067689-A - Immersion cooling system

KR20260067689AKR 20260067689 AKR20260067689 AKR 20260067689AKR-20260067689-A

Abstract

The present invention comprises a dry cooler that cools a first circulating cooling water by exchanging heat between the first circulating cooling water circulating along its interior and outside air; a chiller that replenishes a cooling source to the first circulating cooling water by exchanging heat between the first circulating cooling water circulating along its interior and a refrigerant cooled by a refrigeration cycle; a first heat exchanger that cools the second circulating cooling water by exchanging heat between the first circulating cooling water and the second circulating cooling water, with one side connected to a first circulation line through which the first circulating cooling water circulates and the other side connected to a second circulation line through which the second circulating cooling water circulates; a second heat exchanger that cools the cooling solution by exchanging heat between the second circulating cooling water and the cooling solution, with one side connected to a second circulation line through which the second circulating cooling water circulates and the other side connected to a third circulation line through which a cooling solution circulates; and a device connected to a third circulation line through which a cooling solution circulates, containing a cooling solution at a certain level inside, and cooling an electronic device by immersing it in the cooling solution. It provides a liquid immersion cooling system that includes a liquid immersion cooling unit, reduces power consumption for air conditioning equipment for data center cooling, generates less noise during operation, requires less installation space compared to air-cooled cooling systems, and incurs lower operating costs compared to air-cooled systems.

Inventors

최병남
고민건
한호승
박태준

Assignees

주식회사 삼화에이스

Dates

Publication Date: 20260513
Application Date: 20241106

Claims (14)

A dry cooler that cools the first circulating cooling water by exchanging heat between the first circulating cooling water circulating along the interior and the outside air; A refrigeration unit that replenishes a cooling source to the first circulating cooling water by exchanging heat between the first circulating cooling water circulating along the interior and the refrigerant cooled by the refrigeration cycle; A first heat exchanger having one side connected to a first circulation line through which a first circulating cooling water circulates, and the other side connected to a second circulation line through which a second circulating cooling water circulates, thereby cooling the second circulating cooling water by exchanging heat between the first circulating cooling water and the second circulating cooling water; A second heat exchanger having one side connected to a second circulation line through which a second circulating cooling water circulates, and the other side connected to a third circulation line through which a cooling solution circulates, thereby cooling the cooling solution by exchanging heat between the second circulating cooling water and the cooling solution; A liquid immersion cooling system comprising: a liquid immersion cooling unit connected to a third circulation line through which a cooling solution circulates, containing a cooling solution at a certain level inside, and cooling an electronic device by immersing it in the cooling solution.
In claim 1, The above-mentioned liquid immersion cooling unit is A cooling tank that holds a cooling solution at a certain level in an internal space in which multiple electronic devices are housed; A discharge box provided on one side of the upper portion of the cooling tank and collecting the cooling solution introduced from the internal space of the cooling tank and discharging it to the outside; and A distribution plate provided at the bottom of the cooling tank and spraying a cooling solution introduced from the outside into the internal space of the cooling tank; A liquid immersion cooling system comprising a housing that accommodates the above-mentioned cooling tank.
In claim 1, The above distribution plate is A liquid immersion cooling system characterized by having an upper surface area that extends along the horizontal or vertical length of the bottom surface of the cooling tank, and having ejection holes formed at regular intervals along the upper surface area for ejecting a cooling solution.
In claim 2, The above discharge box is A liquid immersion cooling system characterized by collecting cooling solution that overflows beyond a partition wall disposed between the internal space of the above-mentioned cooling tank.
In claim 1, The above-mentioned liquid immersion cooling unit is An immersion cooling system further comprising a leak prevention deck for collecting cooling solution leaked to the outside from the above-mentioned immersion cooling unit.
In claim 5, Inside the above-mentioned oil leak prevention deck An immersion cooling system equipped with a leak detection sensor that detects the cooling solution leaked to the leak prevention deck and generates a warning signal when a leak occurs from the above-mentioned immersion cooling unit to the leak prevention deck.
In claim 1, The above first heat exchanger and second heat exchanger A liquid immersion cooling system characterized by being a plate heat exchanger.
In claim 1, A dry-bulb temperature sensor and a wet-bulb temperature sensor equipped in the above dry cooler and refrigerator, the dry-bulb temperature of the outside air ( ) and, wet-bulb temperature ( ) measures, and the measured outdoor dry-bulb temperature ( ), outdoor wet-bulb temperature ( A liquid immersion cooling system characterized by operating in winter, summer, and emergency operation modes based on the comparison value between the ) and the set temperature.
In claim 8, The above winter driving mode is Measured outdoor dry-bulb temperature ( ), outdoor wet-bulb temperature ( ) and compared with the set first setting temperature, dry-bulb temperature ( ), wet-bulb temperature ( A liquid immersion cooling system that operates when ) is lower than a preset first setting temperature.
In claim 9, The above summer driving mode is Measured outdoor dry-bulb temperature ( ), outdoor wet-bulb temperature ( ) and compared with the set first setting temperature, dry-bulb temperature ( ), wet-bulb temperature ( ) is higher than the preset first setting temperature, and the measured outdoor dry-bulb temperature ( ), outdoor wet-bulb temperature ( Compared with ) and the preset second setting temperature, the dry-bulb temperature ( ), wet-bulb temperature ( A liquid immersion cooling system that operates when ) is lower than a preset second setting temperature.
In claim 10, The above emergency driving mode is Measured outdoor dry-bulb temperature ( ), outdoor wet-bulb temperature ( Compared with ) and the preset second setting temperature, the dry-bulb temperature ( ), wet-bulb temperature ( ) A liquid immersion cooling system that operates when the temperature is higher than the preset second setting temperature.
In claim 11, The above winter driving mode is A step of turning off the operation of the chiller, turning off the operation of the dry cooler mist, and operating the dry cooler fan at 20%, and If the temperature measured by the fourth temperature sensor equipped in the first heat exchanger is lower than the set fourth temperature, the step of continuously repeating the step of comparing the temperature measured by the fourth temperature sensor with the set fourth temperature while maintaining the dry cooler fan operating rate at 20%, and An immersion cooling system in operation that includes the step of controlling the dry cooler fan operation rate in stages when the temperature measured by the fourth temperature sensor is higher than the set fourth temperature, and controlling the operation mode to change to a summer operation mode when the dry cooler fan operation rate is not < 100%.
In claim 12, The above summer driving mode is A step of turning off the operation of the chiller, turning on the mist operation of the dry cooler, and operating the dry cooler fan at 100% operating rate, and A step of, if the temperature measured by the fourth temperature sensor equipped in the first heat exchanger is lower than the set fourth temperature, checking whether the operating rate of the dry cooler fan is < 100%, and if the operating rate of the dry cooler fan is not < 100%, controlling to lower the operating rate of the dry cooler fan; and If the operating rate of the dry cooler fan is < 100%, the dry-bulb temperature of the outside air measured through the dry-bulb temperature sensor ( ) and set dry-bulb temperature( By comparing ) the measured dry-bulb temperature ( ) set dry-bulb temperature ( If lower than ), a step of controlling the change of the driving mode to the winter driving mode, and An immersion cooling system in operation comprising the step of, if the temperature measured by the fourth temperature sensor is higher than the set fourth temperature, confirming that the dry cooler fan operating rate is < 100%, and if the dry cooler fan operating rate is < 100%, controlling to increase the operating rate of the dry cooler fan, and if the dry cooler fan operating rate is not < 100%, controlling to change the operating mode to an emergency operating mode.
In claim 13, The above emergency driving mode is A step of operating the chiller at a 30% operating rate, turning on the dry cooler's mist operation, and operating the dry cooler fan at a 100% operating rate, and If the temperature measured by the fourth temperature sensor equipped in the first heat exchanger is lower than the set fourth temperature, check whether the chiller is operating at an operating rate of > 30%, and if the chiller is not operating at an operating rate of > 30%, the measured wet-bulb temperature of the outside air ( ) is the preset wet-bulb temperature ( A step to check if it is smaller than ), and if it is smaller, to switch to summer mode, and If the temperature measured by the fourth temperature sensor is higher than the set fourth temperature, a step of controlling to increase the operating rate of the refrigerator, and A liquid immersion cooling system comprising a step of controlling to gradually lower the operating rate of the synchronous unit when the temperature measured by the fourth temperature sensor is lower than the set fourth temperature and the operating rate of the refrigeration unit is > 30%.

Description

Immersion cooling system The present invention relates to an immersion cooling system, and more specifically, to an immersion cooling system in which electronic devices (servers) are immersed in an oil-based cooling solution at a certain level and cooled by dissipating heat through the cooling solution. Generally, with the development of the IT industry, public institutions and large corporations are building large-scale IT infrastructure to provide various IT services. For example, servers are installed to support file management, data storage, and program operation, or to share hardware resources such as fax machines, printers, and equipment; and multiple clients, or computer terminals, are installed to connect to these servers via a LAN. The servers establish a network by connecting computers and provide a large amount of storage space. However, if the server is overloaded and overheats, the heat sink or cooling fan may not be able to sufficiently cool the CPU and GPU, and this may cause the server to malfunction or crash. To solve these problems, most internet data centers install and operate separate temperature and humidity control equipment in server rooms where server racks are installed. However, large-scale data centers require a large number of temperature and humidity control devices, and operating them consumes significant costs and energy. In addition to these computer servers, storage and network switches used in data centers, as well as batteries used in various Energy Storage Systems (ESS), generate a significant amount of heat during operation; therefore, a separate cooling system must be installed to dissipate this heat. Systems capable of more efficiently cooling the heat generated by the aforementioned heat generation unit have already been introduced, primarily in large-scale data centers. For example, Public Patent No. 10-2011-9848 (January 31, 2011) introduces a cooling system for a data center suitable for cooling the interior of a data center by comparing the temperature and humidity of the internal air and the external air of the data center and accordingly introducing external air into the interior or circulating internal air. As mentioned above, existing data centers operated using air cooling, but recently, data centers of leading global companies have begun to actively adopt liquid immersion cooling. Due to recent advancements in IT chips, the air cooling efficiency of high-heat, high-density servers is declining, and in the case of some IT chips, the heat load has reached a level where it can no longer be removed by air cooling alone. In the case of conventional technology, it is configured to remove the load from local high-heat servers, but it is insufficient to cool rack-unit servers configured with high heat and high density. In addition, in the case of air cooling, there was a problem in that the energy consumption for cooling servers was so high that it accounted for 30% of the data center's energy consumption, and air cooling requires very large air conditioners, which occupy a large area to accommodate the cooling equipment. Consequently, the configuration of piping and air ducts is very complex, and there was a problem in that a significant number of components were required to configure the facilities. For prior art, refer to Registered Patent No. 10-2271051 (June 24, 2021). FIG. 1 is an exemplary diagram showing a liquid immersion cooling system according to an embodiment of the invention. FIG. 2 is an exemplary diagram showing a liquid immersion cooling unit of a liquid immersion cooling system according to an embodiment of the invention. FIG. 3 is an exemplary diagram showing a leak prevention deck of a liquid immersion cooling system according to an embodiment of the invention. FIG. 4 is a block diagram showing the control logic of a liquid immersion cooling system according to an embodiment of the invention in steps. FIG. 5 is an example diagram showing the state in which a liquid immersion cooling system according to an embodiment of the invention is operated during the winter season. FIG. 6 is a block diagram showing the winter season control logic of a liquid immersion cooling system according to an embodiment of the invention in steps. FIG. 7 is an example diagram showing the state in which a liquid immersion cooling system according to an embodiment of the invention is operated during the summer season. FIG. 8 is a block diagram showing the summer control logic of a liquid immersion cooling system according to an embodiment of the invention in steps. FIG. 9 is an example diagram showing the state in which an immersion cooling system according to an embodiment of the invention is operated in an emergency. FIG. 10 is a block diagram showing the emergency control logic of a liquid immersion cooling system according to an embodiment of the invention in steps. Hereinafter, preferred embodiments according to the present invention will be described in detail with